Characterization of High Pressure Water Descaling Jets for Slabs Based on Different Shape Factors

• Autorzy: Yang Bowen , Liu Guangqiang , Xu Chengcheng , Liu Kun , Han Peng

Identyfikatory

DOI

10.24425/afe.2024.149259

• Języki publikacji: EN

Abstrakty

EN

The surface temperature of steel billets during hot rolling can reach up to 1200°C. High temperature promotes rapid oxidation of the surface of steel billets, forming a dense oxide layer similar to fish scales. If not removed in a timely manner, it will damage the surface of the steel billets and exacerbate the wear of the rolls during the descaling process. There are many methods for descaling, but high-pressure water jet has become the main method for descaling due to its excellent descaling performance, low cost, and ease of use. The tip of the descaling nozzle serves as the main component, and its structural parameters affect the final descaling effect. This research changes the shape factor of the nozzle groove curve and the diameter of the nozzle throat, and performs computational fluid dynamics (CFD) simulations on the simplified nozzle external flow field. The axial velocity at the center of the jet generates a velocity peak at 0.5-1 Dc. The peak velocity increases with the increase of shape factor and throat diameter, and the influence of shape factor on the peak velocity is greater. For a constant target distance, the length of the velocity stable section along the jet impact line increases with the increase of the shape factor. The maximum value of dynamic pressure increases, and the smaller the target distance, the greater the dynamic pressure difference. The trend of water volume is roughly the same as that of dynamic pressure.

Słowa kluczowe

EN

surface temperature; hot rolling; descaling nozzle; external jet; shape factors

PL

temperatura powierzchni; walcowanie na gorąco; dysza do usuwania zgorzelin; strumień zewnętrzny; czynnik kształtu

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2024
• Tom: Vol. 24, iss. 1
• Strony: 121--128
• Opis fizyczny: Bibliogr. 12 poz., il., tab., wykr.

Twórcy

autor

Yang Bowen

• School of Materials and Metallurgy, University of Science and Technology Liaoning, China

autor

Liu Guangqiang

• School of Civil Engineering, University of Science and Technology Liaoning, China

autor

Xu Chengcheng

• Cold Rolling Mill Plant, ANGANG Steel Company Limited, China

autor

Liu Kun

• School of Materials and Metallurgy, University of Science and Technology Liaoning, China

autor

Han Peng

• School of Materials and Metallurgy, University of Science and Technology Liaoning, China

Bibliografia

• [1] Ma, F., Li, Y. & Song, Z.M. (2011). Jet performance testing of high-pressure waterjet descaling nozzles. Advanced Materials Research. 314, 2408-2413. https://doi.org/10.4028/www.scientific.net/AMR.314-316.2408.
• [2] Baofu Kou, Pengliang Huo, Xiaohua Hou, (2020). Research on the influence of external parameters of fan-type nozzle on water jet performance. Shock and Vibration. 2020, 4386259, 1-16. https://doi.org/10.1155/2020/4386259.
• [3] Jiang, T., Huang, Z., Li, J., Zhou, Y. & Xiong, C. (2022). Effect of nozzle geometry on the flow dynamics and resistance inside and outside the cone-straight nozzle. ACS omega. 7(11), 9652-9665. https://doi.org/10.1021/acsomega.1c07050.
• [4] Sushma, L., Deepik, A.U., Sunnam, S.K. & Madhavi, M. (2017). CFD investigation for different nozzle jets. Materials Today: Proceedings. 4(8), 9087-9094. https://doi.org/10.1016/j.matpr.2017.07.263.
• [5] Gu, B., Hu, R., Wang, L., & Xu, G. (2022). Study on the influence rule of high-pressure water jet nozzle parameters on the effect of hydraulic slotting. Geofluids. 2022, 4510194. https://doi.org/10.1155/2022/4510194.
• [6] Frick, J.W. (2009). Optimisation of technologies for hydro-mechanical descaling of steel. Metallurgical Research & Technology. 106(2), 60-68. https://doi.org/10.1051/ metal/2009015.
• [7] Zhang, D., Wang, H., Liu, J., Wang, C., Ge, J., Zhu, Y., Chen, X. & Hu, B. (2022). Flow characteristics of oblique submerged impinging jet at various impinging heights. Journal of Marine Science and Engineering. 10(3), 399. https://doi.org/10.3390/jmse10030399.
• [8] Song, X., Lyu, Z., Li, G. & Hu, X. (2017). Numerical analysis of the impact flow field of multi-orifice nozzle hydrothermal jet combined with cooling water. International Journal of Heat and Mass Transfer. 114, 578-589. https://doi.org/10.1016/j.ijheatmasstransfer.2017.06.106.
• [9] Gongye, F., Zhou, J., Peng, J., Zhang, H., Peng, S., Li, S. & Deng, H. (2023). Study on the removal of oxide scale formed on 300 M steel special-shaped hot forging surfaces during heating at elevated temperature by a high-pressure water descaling process. Materials. 16, 1745, 1-14. https://doi.org/10.3390/ma16041745.
• [10] Wen, J., Qi, Z., Behbahani, S. S., Pei, X. & Iseley, T. (2019). Research on the structures and hydraulic performances of the typical direct jet nozzles for water jet technology. Journal of the Brazilian Society of Mechanical Sciences and Engineering. 41, 1-12. https://doi.org/10.1007/s40430-019-2075-2.
• [11] Rouly, E., Warkentin, A. & Bauer, R. (2015). Design and testing of low-divergence elliptical-jet nozzles. Journal of Mechanical Science and Technology. 29, 1993-2003. https://doi.org/10.1007/s12206-015-0420-7.
• [12] Huang, F., Mi, J., Li, D. & Wang, R. (2020). Impinging performance of high-pressure water jets emitting from different nozzle orifice shapes. Geofluids. 2020, 8831544. https://doi.org/10.1155/2020/8831544.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024)